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Exercise6Summary.docxPlease type your responses in RED and submit on Canvas.
|
EXERCISE #6 – LAB SUMMARY |
NAME: __________________________
LAB DAY ________ TIME: _________
TABLE 6.1 Light absorption characteristics of chlorophyll.
|
WAVELENGTH (nm) |
COLOR OF LIGHT AT THIS WAVELENGTH |
ABSORBANCE |
|
400 |
Violet |
0.8 |
|
425 |
Blue/Violet |
1.09 |
|
450 |
Blue |
0.98 |
|
475 |
Blue |
0.53 |
|
500 |
Blue/Green |
0.1 |
|
525 |
Green |
0.08 |
|
550 |
Green/Yellow |
0.12 |
|
575 |
Yellow |
0.18 |
|
600 |
Yellow/Orange |
0.24 |
|
625 |
Orange |
0.6 |
|
650 |
Red |
0.08 |
|
675 |
Violet |
0.8 |
________________________________________________________________________________________________
1. Identify the colors of light and their corresponding wavelengths that showed the highest amount of absorption by the chlorophyll extract. (Hint: look at the two peaks on your graph)
2. Would the colors and corresponding wavelengths you identified in question #1 be capable or incapable in stimulating photosynthesis? Explain why.
3. What would you expect to happen to the rate of photosynthesis if you exposed a plant to an environment in which only green light was present? Explain your answer.
Table 6.2: Oxygen production at 40 cm distance
|
Minutes
|
0 |
5 |
10 |
15 |
20 |
|
Elodea (ml) |
0.2 |
0.21 |
0.23 |
0.25 |
0.27 |
|
Control (ml) |
0.2 |
0.2 |
0.2 |
0.21 |
0.21 |
|
Elodea – Control (graphing data) |
0 |
0.01 |
0.03 |
0.04 |
0.06 |
Table 6.3: Oxygen production reading at 25 cm distance
|
Minutes
|
0 |
5 |
10 |
15 |
20 |
|
Elodea (ml) |
|
|
|
|
|
|
Control (ml) |
|
|
|
|
|
|
Elodea – Control (graphing data) |
|
|
|
|
|
Using the above experimental data and graph provided in the Lab 6 PowerPoint on Canvas, answer the following questions:
5. At the end of the 20-minute experiment, what two gasses are present in the tube containing Elodea?
6. If the light intensity experiment had been conducted with only the tube containing the plant, the second tube (without plant) not included, would this experiment be valid? Why or why not? Explain.
7. Based on the data above, how does light intensity or distance from light source affect rate of oxygen production?
________________________________________________________________________________________________
8. Photosynthesis involves two distinct processes: The Light Reactions are said to be light-dependent, while the Calvin cycle is said to be light-independent.
a. What is/are the primary product(s) of the light-dependent reaction (Light reactions)? ______________________
b. What is/are the primary product(s) of the light-independent reaction (Calvin cycle)? ______________________
c. In which of the above reactions is water split to produce oxygen? ________________________
d. Write the equation (balanced) for photosynthesis:
6 ______ + 6 _______ → ___________ + 6 _______
Reactants light Products
e. What reactant(s) in photosynthesis is/are oxidized (lose electrons)? ___________________________
f. What reactant(s) in photosynthesis is/are reduced (gain electrons)? ___________________________
g. What subatomic particle is absorbing light energy & being stored in the chemical bonds of glucose? ___________
1
Exercise #6 – Biology 105 Lab
Exercise #
6
–
Biology 105 Lab
1
Please type your responses in
RED
and submit on Canvas.
EXERCISE #6
–
LAB SUMMARY
NAME: __________________________
LAB DAY ________ TIME: _________
TABLE 6.1
Light absorption characteristics of
chlorophyll
.
WAVELENGTH
(nm)
COLOR OF LIGHT
AT THIS WAVELENGTH
ABSORBANCE
400
Violet
0.8
425
Blue/Violet
1.09
450
Blue
0.98
475
Blue
0.53
500
Blue/Green
0.1
525
Green
0.08
550
Green/Yellow
0.12
575
Yellow
0.18
600
Yellow/Orange
0.24
625
Orange
0.6
650
Red
0.08
675
Violet
0.8
_____________________________________________________________________________
________
_____
_____
_
Using
the
data
above
and
graph
(provided in the Lab 6 Pow
erPoint
on Canvas
)
, answer the following questions:
1.
Identify the colors of light and their corresponding wavelengths that showed the highest amount of absorption by the
chlorophyll extract.
(Hint: look at the two peaks on your graph)
2.
Would the colors and corresponding wavelengths you identified in qu
estion #1 be capable or incapable in stimulating
photosynthesis? Explain why.
3
.
What would you expect to happen to the rate of photosynthesis if
you exposed a p
lant to an environment in which
only
green light was present?
Explain your answer.
Exercise #6 – Biology 105 Lab
1
Please type your responses in RED and submit on Canvas.
EXERCISE #6 – LAB SUMMARY
NAME: __________________________
LAB DAY ________ TIME: _________
TABLE 6.1 Light absorption characteristics of chlorophyll.
WAVELENGTH (nm)
COLOR OF LIGHT
AT THIS WAVELENGTH
ABSORBANCE
400
Violet 0.8
425
Blue/Violet 1.09
450
Blue 0.98
475
Blue 0.53
500
Blue/Green 0.1
525
Green 0.08
550
Green/Yellow 0.12
575
Yellow 0.18
600
Yellow/Orange 0.24
625
Orange 0.6
650
Red 0.08
675
Violet 0.8
________________________________________________________________________________________________
Using the data above and graph (provided in the Lab 6 PowerPoint on Canvas), answer the following questions:
1. Identify the colors of light and their corresponding wavelengths that showed the highest amount of absorption by the
chlorophyll extract. (Hint: look at the two peaks on your graph)
2. Would the colors and corresponding wavelengths you identified in question #1 be capable or incapable in stimulating
photosynthesis? Explain why.
3. What would you expect to happen to the rate of photosynthesis if you exposed a plant to an environment in which only
green light was present? Explain your answer.
